/*
 * Copyright 2018 New Vector Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package im.vector.util

import java.lang.ref.WeakReference
import kotlin.reflect.KProperty

fun <T> weak(value: T) = WeakReferenceDelegate(value)

class WeakReferenceDelegate<T>(value: T) {

    private var weakReference: WeakReference<T> = WeakReference(value)

    operator fun getValue(thisRef: Any, property: KProperty<*>): T? = weakReference.get()
    operator fun setValue(thisRef: Any, property: KProperty<*>, value: T) {
        weakReference = WeakReference(value)
    }
}